Waterway Plastics Renegade 540-5307 Gray Gunite Venturi In-Ground Skimmer with 2" Socket - The skimmer is a very important part of the filtration system on a swimming pool. The skimmer is permanently installed to skim the top of the pool to collect dirt and debris before they have a chance to sink to the bottom of the pool. The Waterway Renegade Venturi Skimmer has the latest in high tech features and a "service- ease" design making this the ultimate pool skimmer!